Submission #978125

#	Time	Username	Problem	Language	Result	Execution time	Memory
978125		Isam	Global Warming (CEOI18_glo)	C++17	10 / 100	2074 ms	2752 KiB

glo

#include<bits/stdc++.h>
using namespace std;

#define eb emplace_back
#define intt long long
#define all(x) begin(x),end(x)


constexpr int sz = 2e5 + 5;
constexpr intt inf = 1E18 + 7;

int n, x, t[sz];

signed main(){
	ios_base::sync_with_stdio(0), cin.tie(0);
	
	cin >> n >> x;
	
	for(register int i = 1; i <= n; ++i){
		cin >> t[i];
	}
	
	vector<intt> dp(n+1, inf);
		
	dp[0] = -inf;
		
	for(register int i = 1; i <= n; ++i){
			
		int l = upper_bound(all(dp), t[i]) - dp.begin();
		if(dp[l] > t[i] && dp[l-1] < t[i]) dp[l] = t[i];
			
			
	}
	
	int ans(1);
		
	for(register int i = 1; i <= n; ++i) if(dp[i] ^ inf) ans = i;
	
	if(x == 0) return cout << ans << '\n', 0; 
		
	
	for(register int i = n; i >= 1; --i){
		
		t[i] += x;
		
		dp.assign(n + 1, inf);
		
		dp[0] = -inf;
				
		
		
		for(register int j = 1; j <= n; ++j){
			
			int l = upper_bound(all(dp), t[j]) - dp.begin();
			
			if(dp[l] > t[j] && dp[l-1] < t[j]) dp[l] = t[j];
			
		}
	
		
		for(register int j = ans; j <= n; ++j) if(dp[i] ^ inf) ans = max(ans, i);
		
		
		
		
		
	}
	
	
	
	
	cout << ans << '\n';
		
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:19:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   19 |  for(register int i = 1; i <= n; ++i){
      |                   ^
glo.cpp:27:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   27 |  for(register int i = 1; i <= n; ++i){
      |                   ^
glo.cpp:37:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   37 |  for(register int i = 1; i <= n; ++i) if(dp[i] ^ inf) ans = i;
      |                   ^
glo.cpp:42:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   42 |  for(register int i = n; i >= 1; --i){
      |                   ^
glo.cpp:52:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   52 |   for(register int j = 1; j <= n; ++j){
      |                    ^
glo.cpp:61:20: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   61 |   for(register int j = ans; j <= n; ++j) if(dp[i] ^ inf) ans = max(ans, i);
      |                    ^

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25